However, there is a positive relationship between eco-efficiency and financial performance according to most of the literature that was consulted in the literature review. In this literature, a number of reasons are mentioned about why eco-efficiency could lead to a better financial performance. Some reasons are similar to reasons that we already mentioned in the previous paragraph: reputational advantages, more efficient use or resources, avoiding financial penalties from the government and sales benefits for customers that are sensitive to social issues. There were also some additional reasons mentioned in the literature review of Guenster et al (2006). First, eco-efficiency may improve an investor’s trust in the company. Second, goodwill can be generated and new market opportunities can be created by displaying social and environmental awareness (Porter & van der Linde, 1996, Guenster et al, 2006). Third, some publications stated that equity returns and firm value are (on average) higher for eco-efficient companies. Fourth, the stock price may increase as a result of positive environmental information about a company